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7351343 |
Copper metal recovery system
The present invention generally relates to a copper metal recovery system, able to integrate with a waste treatment system of a circuit board manufacture plant, includes a stirring unit, a...
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7297315 |
Method of recovering a cleaning agent
The invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing copper oxide, a cleaning agent containing basic copper carbonate, a...
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7122167 |
Precious metal recovery from organics-precious metal compositions with supercritical water reactant
A supercritical oxidation process carried out in water is capable of oxidizing “organics” in precious metal organic compositions such as heterogeneous (Pt/C) or homogeneous precious metal...
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6998069 |
Electrode material for positive electrodes of rechargeable lithium batteries
The electrode material for positive electrodes of rechargeable lithium batteries is based on a lithium transition metal oxide. Said lithium transition metal oxide is a lithium transmission metal...
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6860933 |
Process for depositing layers of zirconium oxide using soluble powders
A sol-gel process for producing layers of zirconium oxide is described which comprises the following stages:
(i) production of a soluble, zirconium-containing powder by:
(a)...
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6656390 |
Preparation of energy storage materials
A process is provided for the preparation of a metallic oxide composite including mixing an aqueous solution of a water-soluble metal compound and colloidal silica, depositing the mixture upon a...
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5702575 |
Method of preparing an electrochemical planar metal/metal oxide electrode
An improved active electrode for use in planar sensors has been discovered, the electrode prepared by a process comprising combining a base component with a metal paste and heating the paste in the...
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5409686 |
Process for producing yellow copper (I) oxide with narrow particle size range
In a process of producing copper(I) oxide by the action of an aqueous solution of a mineral acid and of oxygen-containing gas on small-lump copper metal with continuous agitation, a temperature...
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5152973 |
Synthesis of submicron powders under reduced oxygen pressure
The invention process provides a metal oxide, or oxides of more than one more metal, wherein the oxides have a mean particle size less than 1 micron. The oxides are made by steps including (1)...
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5089452 |
Method for preparing catalyst precursor for methanol synthesis
A method for preparing a catalyst precursor for methanol synthesis using copper sulfate recovered from low-cost copper etching waste solution as the source of copper, which comprises using...
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5008017 |
Method for recovering metals from waste liquors
Waste liquors containing small amounts of silver salts are treated with aluminum hydroxide to produce a floc reduced in volume by the addition of an acid and mixed with a metal bicarbonate and...
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4891067 |
Processes for the treatment of smelter flue dust
A process for the treatment of flue dust from copper and lead smelters includes the steps of subjecting a slurry (10) of water and flue dust to a first caustic leach (12) to form a first liquids...
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4764284 |
Process for removing of heavy metal from water in particular from waste water
Process for removing Sr and heavy metals from water in particular from waste water by throughly mixing it with a solution of an alkali metal carbonate and/or hydrogen carbonate in a reactor...
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4659555 |
Process for the preparation of basic copper carbonate
The invention relates to a process for the preparation of basic copper carbonate by reacting copper salts with alkali carbonate in aqueous solution at elevated temperatures and with stirring and...
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4655829 |
Metal recovery process
Metal values are separated from arsenic sulfide ores in a hydrometallurgical oxidation process using a balanced reactant slurry. The molar concentration of As and Sb in the reactant slurry is...
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4652381 |
Battery plant waste water treatment process
A process of treating industrial waste water contaminated with environmentally unacceptable amounts of sulfuric acid and heavy metals such as lead, copper or zinc is disclosed which permits...
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4614640 |
Process of producing copper (II) hydroxide
Copper(II) hydroxide is produced by a reaction of copper oxychloride in an aqueous suspension with alkali hydroxide or alkaline earth metal hydroxide in the presence of a stabilizing agent and the...
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4585477 |
Method for separating and recovering nickel and copper from complex materials
A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating, for...
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4404169 |
Process for producing cupric hydroxide
In a process of producing cupric hydroxides, products having a high stability in storage will be obtained if phosphate ions are added to a suspension of copper oxychloride in an aqueous phase, the...
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4369164 |
Recovery of copper from arsenical drosses by ammonium arsenate leach
A process for leaching copper and arsenic from copper dross containing copper arsenide and separated from molten lead bullion comprises leaching the dross with an aqueous ammoniacal solution...
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4297134 |
Method of recovering gold
A process for recovering gold from a raw material containing gold by treating the raw material with either aqua regia or hydrochloric acid to form chloroauric acid, extracting the chloroauric acid...
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4267069 |
Regeneration of activated carbon to increase its gold adsorption capacity
A method of regenerating an activated carbon which has had its collecting capacity for gold adsorption reduced through use which includes the step of contacting the carbon with an aqueous copper...
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4176160 |
Process for purifying a zinc sulfate solution
Process for purifying an iron containing zinc sulfate solution which comprises precipitating iron from said solution as a slurry in at least one of the following forms at a pH which is maintained...
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4150091 |
Manganese ore leaching process
The process of leaching manganiferous ocean nodule ores with HCl whereby the manganese and other metals present, such as iron, zinc, cobalt, nickel, copper, and like are converted from oxides,...
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4123499 |
Recovering metal values from marine manganese nodules
A method for selectively extracting metal values from manganese bearing ores such as marine nodules. The ore is initially leached to solubilize manganese and other desirable metals as nitrates. The...
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4123500 |
Recovery of precious metals by oxidation in the aqueous phase of associated carbonaceous support material
This invention relates to the recovery of precious metals. More particularly, the invention relates to a process for the recovery of a catalytic metal from a carbonaceous residue or support...
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4118221 |
Copper recovery from sulfate solutions containing nickel and cobalt
Copper is separated from nickel present therewith in a sulfate solution by neutralizing to precipitate all the copper and some nickel as basic compounds, and thereafter reducing the copper in the...
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4065300 |
Method for extraction of copper products from copper bearing material
Cuprous oxide and finely divided metallic copper are recovered from copper bearing material by an improved chemical process involving the dissolving of the copper bearing material in a solution of...
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4065542 |
Two stage leaching of limonitic ore and sea nodules
A process which enables cumulative recovery of nonferrous metal values from manganiferous sea nodules and a limonitic ore comprises treating the limonitic ore in an aqueous acidic medium under...
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4018866 |
Metal carbonate recycle to reduction circuit in the cuprion process
A process in which copper, nickel, cobalt and molybdenum are recovered by direct leaching of comminuted raw manganese nodules after the nodules are reduced in a reduction circuit with an aqueous...
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4007037 |
Composition and method for chemically etching copper elements
This invention resides in compositions and methods for chemically etching copper elements. The etching solution of this invention is composed of materials which can be easily regenerated and the...
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3996046 |
Extraction and purification of silver from sulfates
A method is provided for extracting silver from a silver sulfate-bearing substance, such as oxide materials, metal or metal sulfate mixtures containing silver sulfate which comprises subjecting...
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3990891 |
Halidation of nonferrous metal values in manganese oxide ores
This invention provides a process for obtaining the nonferrous metal values from a manganese oxide ore, by reacting the ore with an aluminum halide or a ferric halide at a temperature of at least...
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3986866 |
Method of recovery of metal compounds and metals from nitrate solutions
A method is provided for recovering metal compounds and metals from ores, concentrates, alloys and other metal containing materials. The material containing said metals is leached in an aqueous...
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3981962 |
Decomposition leach of sulfide ores with chlorine and oxygen
Complex sulfide ores or concentrates are decomposed by treatment with a combination of chlorine and oxygen, the amount of chlorine being limited to that necessary to convert sulfides of the desired...
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3979265 |
Recovery of metals from sulfur bearing ores
Sulfur monochloride is reacted with an ore containing iron, sulfur and a metal which forms a water soluble ammine complex or an ammonium-containing double salt, to yield metal chlorides and sulfur....
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3971652 |
Ammoniacal extraction of copper from metallic materials
A method of leaching copper values from copper dross obtained from pyro-metallurgical lead bullion by contacting finely-divided particles of the copper dross with an aqueous ammoniacal solution,...
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3970737 |
Metal, particularly gold, recovery from adsorbed cyanide complexes
The invention provides a method of recovering transition or noble metal values, particularly gold and silver values, from a support having absorbed thereon the metal values in the form of an ionic...
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3967958 |
Method of winning copper, nickel, and other metals
The invention is a process for winning nickel by treating an aqueous ammonium salt solution of nickel salts with a carbon monoxide-containing gas under reducing conditions to produce nickel...
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3962402 |
Oxidation-leaching of chalcopyrite
A method is described for the oxidation-leaching of chalcopyrite concentrates at high temperatures and pressures for the extraction of copper values as copper sulfate in which temperatures are...
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3961908 |
Autoclave system for leaching sulfide concentrates
A method and apparatus for high temperature-high pressure acid leaching of sulfide ores is described. The apparatus includes an autoclave having a plurality of pressurized compartments and a water...
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3953306 |
Metal recovery from waste treatment sludges
An improved process for preparing highly concentrated salt solutions of metals of high purity from waste metal sludges at superior dissolution rates is achieved by preparing, concentrating and...
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3920789 |
Separation of PGM's from each other and from gold
At least one of rhodium, iridium and ruthenium is separated from at least e of gold, platinum and palladium in a solution of such metals. Separation if effected by (a) evaporating the solution to...
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3920790 |
Separating and purification of platinum group metals and gold
A method of performing an aqua regia leach on a mixture of PGMs and gold rein prior to the leach step the PGMs and gold are alloyed with lead by fusing a lead compound, a flux and a reductant for...
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3917519 |
Process for the manufacture of electrolytic copper
A process is described for making electrolytic copper of high quality from chalcopyrite flotation concentrates, and the like. The concentrates are first slurried and then subjected to a high...
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3903236 |
Method for obtaining metal values by the halidation of a basic manganiferous ore with ferric chloride pre-treatment
This invention provides an improvement in the process of obtaining metal values from manganiferous iron-containing ore by halidating the ores and separating the metal values from the ore as the...
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3880651 |
CHLORINE LEACHING OF NON-FERROUS METAL VALUES WITH AMMONIACAL SOLUTIONS
A ferruginous material containing at least one nonferrous value selected from the group consisting of nickel, cobalt, copper and manganese is, after reduction, immersed in water and then contacted...
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3876748 |
Extraction of metals from iron oxide materials
Non-ferrous metal values, such as nickel, cobalt or copper, contained in oxide ores, or roasted sulfide ores, that also contain iron, are selectively reduced to the metallic state, and the...
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3876747 |
Separation and purification of iridium
A method of separating iridium from at least one other metal of the group nsisting of platinum, palladium, ruthenium, rhodium and gold comprising converting the PGMs and gold in a solution thereof...
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3833352 |
PROCESS FOR BENEFICIATING MOLYBDENATE CONCENTRATE TO PRODUCE MOLYBDENUM TRIOXIDE
A process for the beneficiation of molybdenite concentrate comprising preheating the concentrate under inert conditions and contacting the concentrate with oxygen when the concentrate is at a...
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